CVE-2026-6684: fatfs before r0.16 (exclusive); +1 more affected products

CVE-2026-6684. CVSS 3.1 base score 4.6 (MEDIUM, Source advisory). EPSS 0.00306 (percentile 0.22234), scored 24-Oct-2026.

Affected technology

fatfs · before r0.16 (exclusive)
elm-chan

FatFs · 0 to before R0.16
ChaN

Description’s affected range: prior to R0.16 that use GPT scanning with 'FF_LBA64 = 1'

Component: Not specified by the source

Attack conditions (Source advisory, CVSS 3.1): Physical access · No privileges required · No user interaction required

What an attacker can do

Source advisory’s CVSS 3.1 assessment (base score 4.6/10) rates confidentiality and integrity impact as none; availability impact as high. The description does not specify what an attacker can achieve beyond these rated impacts.

Published 25-Oct-2026 19:52 UTC

CWE: CWE-835
CCR priority: 18.5 /100 (P5)
CVSS 3.1: 4.6 /10 · CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H · Source advisory
EPSS: 0.00306 · percentile 0.2314 · 2026-10-25
KEV: no

Provenance

FIRST EPSS daily exploit-probability · Source record · observed 2026-10-25 19:52:47.952465+00:00 UTC
NVD CVE API 2.0 · Source record · observed 2026-10-25 19:51:06.643138+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-6684.html